Gk hasecoster



(No Model.) 4 Sheets-Sheet 1'. G. HASECOSTER.

FURNACE FOR STEAM BOILERS.

No. 350,245. Patented 001;. 5," 1886.

ATTORNEYS.

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(No Model.). I 4 Sheets-Sheet 2.

- G. HASEOOSTER.

FURNACE FOR STEAM BOILERS. No. 350,245. Patented Oct. 5, 1886.

WITNESSES (No Model.)

4 Sheets-Sheet 3. G. HASEOOSTER. I

FURNACE FOR STEAM BOILERS.

,245. PatentedOOtQS, 18.86.

v No. 350

WITNESSES ATTORNEYS;

(No Model.)

' 4 sheetssneet 4. G. HASEOOSTER! FURNACE FOR STEAM BOILERS.

o. 350,245. Patented 00115, 1886..

WITNESSES ATTORNEYS.

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PATENT Price.

GEORGE HASECOSTER, OF ST. LOUIS, MISSOURI.

FURNACE FOR STEAM-BO|LERS.

SPECIFICATION forming part of Letters Patent No. 350,245, dated October 5,1886.

Application filed March 25, 1886.

T0 aZZ whom it may concern.-

Be it known that I, GEORGE HAsEoos'rnR, of the city of St. Louis, and State of Missouri, have invented a new and Improved Furnace for Steam-Boilers, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved furnace for steam boilers and for other purposes, in which a complete combustion of the fuel is accomplished by introducing a mixture of steam, hot air, and gases into the fuel.

The invention consists in a specially-constructed furnace and chimney, and in an apparatus for forcing a mixture of hot air, steam, and gases into the fuel.

The invention also consists of various parts and details, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal sectional elevation of my improvement. Fig. 2 is a sectional plan view of the same on the line as m, Fig. 1. Fig. 3 is a cross sectional elevation of the same on the line 911/, Fig. 2. Fig. 4 is a sectional elevation of the chimney on the line z .2, Fig. 2. Fig. 5 is a cross-seetion on the line an, Fig. 1. The steam-boiler A, of any approved construction, is mounted in the furnace B, provided with the usual grate-bars, O, the ash-pit D, the doors D, leading to the ash-pit, and the doors E,,openi n g into the combustion-chamber E above the grate-bars.

The bridge-wall F at the inner end of the gratebars O is provided with a partition-wall, G, which divides the furnace into two main compartmentsthe combustion -chamber E and the hot-air chamber H. The bridge-wall F is provided with several flues, F, which commence under the grate-bars 0, run inward and then upward, and open into the combustionchamber E at the rear of the grate-bars O.

In the side walls, B, of the furnace B are ducts or fiues I", which lead from the ash-pit D to the vertical passage 1, which connects at its top by the fine I with the combustion-chamber E. The fine I is provided with a damper, I, which can be opened or closed from the front of the furnace by a damper-rod, 1*.

Serial No. 196.538. (No moel.)

Into the bottom of the ash-pit D opens a flue or duct, J, which connects with the mixing apparatus K, placed on the outside of the side wall, B, and connecting with the hot air chamber H and a chimney, M, by the trans verse channel N. or more places, so as to reduce the opening N, leading from the hot-air chamber H into the channel N. The hotair chamber H is pro vided with a bottom, H, which is curved upward from the rear end toward the channel N, and is also provided with a door, H through which ashes and cinder-s which accumulate in the hot-air chamber H can be removed.

The mixing apparatus K consists of a fan, K, which is rotated in any convenient manner, into which apparatus opens a pipe, K admitting steam, and it is also provided with an opening, K, through which air can pass into the fan from outside. The heating of the journatbox O of the mixing apparatus K is prevented by the circulation of cold water around the fan-shaft O in the journal-box 0, said water being supplied by a small pipe, 0, and drawn off through the pipe 0. nel N is provided at its entrance to the chim ney M with a hinged damper, P, operated from the front of the furnace by the damperrod 1 The chimney M is provided on its three outer sides with doors Q, Q, and Q, of which the door Q leads directly into the central chimneycpeuing, M, while the doors Q, and Q connect with the vertical side fines, It, which open into the central opening, M, by means of the apertures R. The opening of the fine J into the ash-pit D can be closed by the door S, so as to prevent ashes and cinders from falling into the said flue when being removed from the ash-pit.

The operation is as follows: The flames and heated gases from the fire on the grate-bars 0 rise and lap up on the sides of the boiler and on the front end of the same in the combustion-chamber E. The heated gases and flames enter the boiler flues A at the front end of the boiler A, and, passing through thesame, enter the hot-air chamber H, from which they are drawn up the inclined bottom Hinto the channel N by the suction of the fan K and the draft of the chimney M. That portion of the unconsumed products of combustion which passes into the chimney is drawn thereinto by the The latter is arched at two The chandraft or circulation set up by the action of the fan, the same consisting in the current of air forced from the fan through the pipe J into the chamber D, through the passages I I I into the chamber E, thence through the boilertubes and into the hot-air chamber H, whence the same will be forced through the opening N into the channel N above the damper P and into the central opening or passage, M, of the chimney, passing thence into the open air. The remainder of the heated products, consisting of combustible gases and hot air, passes into the mixing apparatus K, where it is mixed by the action of the fan K with the steam (generally exhauststeam) entering through the pipe K and with the fresh air entering from the chimney M. This mixtureis thendiverted into the fine J and enters the aslrpit D, from which part of it passes directly through the grate G into the burning fuel, part enters the flues F and passes from the rear into the combustion-chamber E and over the fuel on the grate-bars O, and part of the mixture passes into the side passages, l, and up through the same, and enters the combnstion-chamber E by means of the openings I. The amount of the mixture which enters the side passage, I, can be regulated by the damper I. The heated products, gases, Ma, pass then from the combnstion-chamber into the fines A of the boiler A, as before described. Air from the outside can enter the chimney M by the side doors Q, and Q", and, after passing up the side flues, It, enters the central opening, M, of the chimney, is forced downward in the same by the suction of the fan K, and is heated in this downward motion by the incombustible and unconsumed gases passing up the central shaft, M, as before described. The outside air is drawn into the chimney by reason of the suction of the fan, the same as before stated, taking or drawing into the mixer a portion of the products of combustion and forcing or sending it into the chimney. as above described, thus creating a partial vacuum in the chimney, assisting the downward passage or entrance of the air from the side ducts, It, of the chimney into the central opening, M, thereof, while the inlet to the channel N from the chimney is of greater area than the inlet thereto from the hot-air chamber II, whereby the cold or fresh air cnrrents,which are heavier than the warmair currents, will descend, passing closely along the sides of the chimney and the bottom of the channel N, under the valve P, whence it'passes into the suction side of the mixer, thus effecting the aforesaid result. The complete combustion of the fuel is thus attained by my improved furnace, the combustible gases being forced from the hot-air chamber into the combnsti(in-chamber, and being additionally charged with a mixture of steam and air.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent-- 1. In a furnace, the combination of a boiler, a combnstion-chamber, and a partition-wall, with ahot-air chamber, a channel, a mixing apparatus, and a return-flue, substantially as herein shown and described.

2. In a furnace, the combination of a boiler, a combustionchamber, an ash-pit, and a partition-wall,witl1 a hot-air chamber, a channel, a mixing apparatus, and a return-flue, substantially as herein shown and described.

3. In a furnace, the combination of a boiler, a colnbnstion-chamber, an ash-pit, and a partition-wall,with a hot-air chamber, a channel, a chimney, a mixing apparatus, and a returnflue, substantially as herein shown and described.

4. In a furnace, the combination of a boiler, a combustionchamber, an ash-pit, a bridgewall, and a partition-wall,with a hotair chamber, a channel, a chimney, a mixing apparatus, and a return-flne, substantially as herein shown and described.

5. In a furnace, the combination of a boiler, a combustion chamber, an ash-pit, a bridge wall provided with fines, a partition-wall dividing the furnace into two main compartments, and side passages which connect the ashpit and the combustion-chamber, with a hot-air chamber, a channel, a chimney, a mix.- ing apparatus, and a return-flue, substantially as herein shown and described.

6. In a furnace, the combination of a boiler, a combnstion-chamber, an aslrpit, and gratebars, with the bridge-wall provided with fines which connect the ash-pit with the combus tion-charnber from the rear, and a partitionwall, substantially as herein shown and described.

7. In a furnace, the combination of a boiler, c0111bastion-chamber, an ash-pit, and grate bars, with side passages leading from the ashpit to the combustion-chamber, a bridge-wall having fines leading from the ash-pit to the combustion-chamber, and a partition-wall, substantially as herein shown and described.

8. In a furnace, the combination of a hotair chamber with a channel and a mixing apparatus provided with a fan, a steam-inlet, and a cold-air inlet, and connected with a return-flue entering the aslrpit, substantially as herein shown and described.

9. In a furnace, the combination of a hot air chamber, a transverse channel, and a mixing apparatus, with a chimney having a central shaft, side passages, and air-inlet doors, substantially as herein shown and described.

10. In a furnace, the combination of a hotair chamber, a transverse channel provided with a damper, and a mixing apparatus, with a chimney having a central shaft, side passages, and air-inlet doors, substantially as herein shown and described.

GEORGE l-IASE(JO."1.EP.

\Vitnesses:

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